The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Jun. 28, 2002
Katsuhito Kuwahara, Tokyo, JP;
Hiroshi Mizushima, Tokyo, JP;
Takayuki Goto, Tokyo, JP;
Yoshiyuki Kakuta, Tokyo, JP;
Katsuhito Kuwahara, Tokyo, JP;
Hiroshi Mizushima, Tokyo, JP;
Takayuki Goto, Tokyo, JP;
Yoshiyuki Kakuta, Tokyo, JP;
Yoshino Kogyosho Co., Ltd., Tokyo, JP;
Abstract
A depression head for pump mechanism increasing sealability on the discharge port and enabling favorable shutting of the liquid leakage, said depression head comprising a mounting cylinder assemblyhaving an upright sliding cylinder communicating with the interior of the stem; a bodyadapted to be depressible relative to the mounting cylinder assemblyand having an attachment cylinderfitted on the sliding cylinder, a valve chamber disposed above the attachment cylinder and defining a discharge portopened its leading end; a valve memberforwardly biased to close the discharge portand defining a passage between the discharge port and a communication portwhich is also communicating with the interior of a pump cylinder; and a lever memberfor coupling to the valve memberto open the discharge port in response to the depression of the head; wherein a resistive force against the depression of the body with respect to the stem is smaller than a resistive force against the depression of the stem itself.